The Echo Archives
#6113.86 adjusted 3.88 for sample size in the official ranking · full ranking
Books 2 books Status Ongoing 2024–present Reading commitment Low Melissa Caruso Last reviewed 2026-08-19
Overview
The Echo Archives is Melissa Caruso's portal-fantasy sequence, comprising The Last Hour Between Worlds (2024) and The Last Soul Among Wolves (2025), published by Orbit, with a third installment announced for 2026. It follows a modern-day archivist who is repeatedly drawn, through a haunted hotel that exists partly outside normal time, into a magical parallel world layered beneath her own, where the dangers, politics, and factions she must navigate deepen and grow more dangerous with each return. Each book is structured around a single, tightly escalating night, giving the series a claustrophobic, countdown-driven pace unusual for portal fantasy, as the protagonist is forced to solve overlapping mysteries and rivalries before the hotel's magic resets. Caruso, previously known for her Swords and Fire trilogy, was praised by reviewers for blending mystery-plot structure with layered secondary-world building, and the series has been noted as part of a wider recent resurgence of portal-fantasy premises in adult fantasy publishing.
Portal fantasy · For Adult
Core Canon: Reading Order (2 works) counts toward ranking
The Echo Archives Melissa Caruso
| Work | Year | Internal chron. | Canon | Rating | |
|---|---|---|---|---|---|
 | The Last Hour Between Worlds | 2024 | 1 | core | 3.79 (5,619 ratings) |
 | The Last Soul Among Wolves | 2025 | 2 | core | 4.17 (1,350 ratings) |
Two books published to date; a third (The Last Star in the Void) is publisher-announced for 2026 but not yet released, so is not recorded as a book in this canon.
Quick answers
- How many books are in The Echo Archives? The Echo Archives's Core Canon is 2 books.
- What is the reading order for The Echo Archives? Publication order, starting with The Last Hour Between Worlds. Full list and years in the Core Canon table above.
- Is The Echo Archives finished? Ongoing (2024–present).
- How much reading does The Echo Archives take? Low reading commitment (estimated from 2 Core Canon books · ~816 pages).
- How is The Echo Archives ranked? #611 in this site's official ranking, based on 6,969 reader ratings across 2 Core Canon books. See the full ranking for how this is calculated.
Why is it ranked #611?
Ranked #611 in the official ranking.
- Average reader rating of 3.86 across 2 core books.
- A smaller readership (6,969 ratings), so the score carries less weight of numbers.
- 0.01 behind #610, Crown of Stars.
- Below the top-10 average of 4.45.
Why explore this universe?
Rated · 2 books · Ongoing · 7k ratings · Ranks #611 overall
Good choice if you want a quick, low-commitment portal fantasy universe that's still ongoing, with new books still coming.
Reading order
Publication order (2 Core Canon books)
- The Last Hour Between Worlds (2024)
- The Last Soul Among Wolves (2025)
Documented internal/story chronology is recorded for every Core Canon book here, and matches publication order exactly, with no divergence to show separately.
Awards (verified)
- No awards found for this universe.
You might also like
Suggestions computed from what The Echo Archives and each of these worlds have in common on record (subgenre, audience, shape, reading commitment and score), not a documented narrative connection.
- The Morgaine Cycle Sword & sorcery / Portal fantasy · Unfinished · Low commitment · 3.99
- Time of Iron Portal fantasy / Romantasy · Ongoing · Low commitment · 3.86
- The Vandarei Trilogy Portal fantasy / Mythic fantasy · Complete · Low commitment · 3.84
- The Wizard Knight Portal fantasy · Complete · Low commitment · 3.82
Official resources
Research details
Ranking metrics: weighted average 3.86 across 6,969 ratings on 2 Core Canon books. See Why is it ranked here? above for the full breakdown, or the full ranking.
How do we know this?
Admission: Admit The Echo Archives (Melissa Caruso) accepted 2026-08-19
Sources: (see source tier definitions)
Last reviewed: 2026-08-20
Rule: Registered as a single-author sequence, Core Canon. Only the two published books are recorded; the announced third volume is not yet released and so is not listed as a book in this canon, per this project's rule against recording unpublished works.